Greta oto is a beautiful brush-footed butterfly and is a member of the: subfamily Danainae, tribe Ithomiini, subtribe Godyridina.
Greta oto adults exhibit a number of interesting behaviours, such as long migrations and lekking (gathering of males for competitive mating displays).
The wings are translucent, with a wingspan of 5.6 to 6.1 cm (2.2 to 2.4 in). Its most common English name is glass winged butterfly, and its Spanish name is “espejitos”, which means “little mirrors.”
The Glass winged butterfly gets its name because the tissue between the veins of its wings looks like glass, as it lacks the coloured scales found in other butterflies. The opaque borders of its wings are dark brown sometimes tinted with red or orange, and its body is dark in color.